Recent content by WenyiJones

okay, the whole time i was calculating wrong. it's correct! how about (b)?

I have the same question here. But when I get sin(theta), I get something over 1. That is not possible. Is my equation wrong? Because I am very sure the units I've been using here are correct. I converted everything into meters.

the equation i used was: maximum equation for multi-slit interference d sin(theta)=m*lamda d=distance between two slits m=the interger called the order (bright spots) theta=angular separation lamda=wavelength but when i plugged in numbers, the sin(theta) i got was easily over 1...

Homework Statement A diffraction grating of 3900 slits per centimeter is used to analyze the spectrum of mercury. (a) Find the angular separation in the first-order spectrum of the two lines of wavelength 579 nm and 577 nm. (b) How wide must the beam on the grating be for these lines to be...